You didn't respond to the Activity Check here. The rules explain it in full. Here's the relevant part.

✗ Activity Checks
Activity checks are performed on the 5th of every month. Players are then given 4 days to post their activity proof in an Activity Check post in rubycity_ooc. At this time, characters and players who have not checked in will be listed in a separate post and given a second chance to respond with proof of activity.

If a player wishes to reclaim a character that has not met the activity requirements for the activity check period, they can comment to reclaim their characters as well. Characters reclaimed this way must then post double activity for the following month or lose their character.

Players that are on hiatus during the time of the activity check do not need to check in themselves. We will review their activity ourselves and if they do not meet activity we will consider the circumstances surrounding their hiatus. Real life comes before RP and it is highly unlikely we will remove anyone from the game who is on hiatus during a check. That said, if it becomes apparent that hiatuses are being used to duck activity checks or to disguise a general lack of activity, this issue will be addressed with the player individually.

While you know you were still playing, we as moderators do not have time to track down each and every character's activity -- especially since activity at RC can also include threads in other people's posts. Therefore players are required to respond to the Activity Check as is outlined in the rules of the game.